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Published byQuentin Harris Modified over 9 years ago
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mu-pair Ozaki san
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Kibayashi san circle: muons which do not go through DSSD #3 red triangle: muons going through the DSSD #3 the IP resolution is worse phi~150 degrees for details see http://www.hp.phys.titech.ac.jp/atsuko/post/2004/0408
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DSSD3 hybrid 7 residual dist. of cosmic ray muons w/o magnetic field after alignment DSSD #3 seems to be not aligned correctly.....
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Cosmic ray muons without magnetic field ( by Kibayashi san)
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Haba san pointed out that this may be due to mis- wirebonding correct connection wrong connection
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Actually I found many combinations of clusters whose sizes are one and two with 1 strip separation. I applied strip address corrections on hybrid #7 The odd strip number is subtracted by 2. if( hybrid == 7 && ( rla % 2 ) == 1 ) rla -= 2;
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cluster width cluster positions on hybrid before correction hybrid #7 Hadron C events (run# 64)
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cluster width cluster positions on hybrid After correction! hybrid #7
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Hybrid #3 for reference. quite similar plots!
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before after the correction
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